ATOM TEST

Isotopes of an element have a different number of...

• Protons

• Neutrons

• Electrons

• Mass

Tags

NGSS.HS-PS1-8

Potassium-39 has how many neutrons?

• 19

• 18

• 20

• 21

Tags

NGSS.HS-PS1-8

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.HS-PS1-8

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.HS-PS1-8

If X is the symbol for an element, which of the following two symbols represent isotopes of the same element?

I. ⁷⁷₃₅X

II. ⁷⁷₃₃X

III. ⁸¹₃₇X

IV. ⁸¹₃₅ X

• I and II

• III and IV

• I and IV

• I and III

Tags

NGSS.MS-PS1-1

Which is the correct definition of isotope?

• Isotopes are atoms of the same element with different numbers of neutrons
• Isotopes are atoms of the same element with different numbers of protons
• Isotopes are atoms of the same element with different numbers of electrons

Tags

NGSS.HS-PS1-8

What number on the element key tells you how many protons an element has?

• Atomic Mass
• Element name
• Atomic number
• Element Symbol

Which description about the proton is accurate?

• Positively charged particle with a mass less than 0 amu
• A neutrally charged particle with a mass less than 0 amu
• Positively charged particle with a mass of 1 amu
• A neutrally charge particle with a mass of 1 amu

Tags

NGSS.HS-PS1-8

Who discovered the electron

• Rutherford

• Thomson

• Millikan

• Dalton

Theory of the atom believed electrons orbited the nucleus like the planets orbit the sun,

(planetary model)

• Bohr

• Thomson

• Millikan

• Rutherford